The dbau1x00 board can be built with various variants which are configured via CONFIG_SYS_EXTRA_OPTIONS. This is deprecated. Thus add new Kconfig options for those board variants.
Signed-off-by: Daniel Schwierzeck
CONFIG_MIPS=y CONFIG_TARGET_DBAU1X00=y CONFIG_SYS_BIG_ENDIAN=y CONFIG_DBAU1550=y
